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                <h1 id="EverydayOneCat"><a href="#EverydayOneCat" class="headerlink" title="EverydayOneCat"></a>EverydayOneCat</h1><p>🛏️🐈💨❌<br>📖🐈🌃✅</p>
<p><img src="https://pluto-1300780100.cos.ap-nanjing.myqcloud.com/img/0b7fa7ed6eff65177f46c52d2bc7e5f7f144f122.png@518w_1e_1c-1601373725257.png" alt="0b7fa7ed6eff65177f46c52d2bc7e5f7f144f122.png@518w_1e_1c" style="zoom:67%;"></p>
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<h1 id="任务调度SpringTask"><a href="#任务调度SpringTask" class="headerlink" title="任务调度SpringTask"></a>任务调度SpringTask</h1><h2 id="1-什么是任务调度"><a href="#1-什么是任务调度" class="headerlink" title="1.什么是任务调度"></a>1.什么是任务调度</h2><p>在企业级应用中，经常会制定一些“计划任务”，即在某个时间点做某件事情，核心是以时间为关注点，即在一个特定的时间点，系统执行指定的一个操作。常见的任务调度框架有Quartz和SpringTask等。</p>
<h2 id="2-入门小Demo"><a href="#2-入门小Demo" class="headerlink" title="2.入门小Demo"></a>2.入门小Demo</h2><p>添加配置文件applicationContext-task.xml</p>
<pre class="line-numbers language-markup" data-language="markup"><code class="language-markup"><span class="token prolog">&lt;?xml version="1.0" encoding="UTF-8"?&gt;</span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>beans</span> <span class="token attr-name">xmlns</span><span class="token attr-value"><span class="token punctuation">=</span><span class="token punctuation">"</span>http://www.springframework.org/schema/beans<span class="token punctuation">"</span></span>
       <span class="token attr-name"><span class="token namespace">xmlns:</span>xsi</span><span class="token attr-value"><span class="token punctuation">=</span><span class="token punctuation">"</span>http://www.w3.org/2001/XMLSchema-instance<span class="token punctuation">"</span></span> <span class="token attr-name"><span class="token namespace">xmlns:</span>p</span><span class="token attr-value"><span class="token punctuation">=</span><span class="token punctuation">"</span>http://www.springframework.org/schema/p<span class="token punctuation">"</span></span>
       <span class="token attr-name"><span class="token namespace">xmlns:</span>context</span><span class="token attr-value"><span class="token punctuation">=</span><span class="token punctuation">"</span>http://www.springframework.org/schema/context<span class="token punctuation">"</span></span>
       <span class="token attr-name"><span class="token namespace">xmlns:</span>task</span><span class="token attr-value"><span class="token punctuation">=</span><span class="token punctuation">"</span>http://www.springframework.org/schema/task<span class="token punctuation">"</span></span>	
       <span class="token attr-name"><span class="token namespace">xsi:</span>schemaLocation</span><span class="token attr-value"><span class="token punctuation">=</span><span class="token punctuation">"</span>http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
                           http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
                           http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task-4.2.xsd<span class="token punctuation">"</span></span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span><span class="token namespace">context:</span>component-scan</span> <span class="token attr-name">base-package</span><span class="token attr-value"><span class="token punctuation">=</span><span class="token punctuation">"</span>com.pinyougou.task<span class="token punctuation">"</span></span><span class="token punctuation">/&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span><span class="token namespace">task:</span>annotation-driven</span><span class="token punctuation">/&gt;</span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>beans</span><span class="token punctuation">&gt;</span></span><span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre>
<p>创建包com.pinyougou.task编写类</p>
<pre class="line-numbers language-java" data-language="java"><code class="language-java"><span class="token annotation punctuation">@Component</span>
<span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">SeckillTask</span> <span class="token punctuation">{</span>
    <span class="token comment">/**
	 * 刷新秒杀商品
	 */</span>
    <span class="token annotation punctuation">@Scheduled</span><span class="token punctuation">(</span>cron<span class="token operator">=</span><span class="token string">"* * * * * ?"</span><span class="token punctuation">)</span>
    <span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">refreshSeckillGoods</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">{</span>
        <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">"执行了任务调度"</span><span class="token operator">+</span><span class="token keyword">new</span> <span class="token class-name">Date</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>		
    <span class="token punctuation">}</span>		
<span class="token punctuation">}</span><span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre>
<p>执行后会看到控制台每秒都输出了当前时间，其中cron设置的为表达式，是执行的时间规则。</p>
<h2 id="3-Cron表达式"><a href="#3-Cron表达式" class="headerlink" title="3.Cron表达式"></a>3.Cron表达式</h2><h3 id="3-1格式"><a href="#3-1格式" class="headerlink" title="3.1格式"></a>3.1格式</h3><p>Cron表达式是一个字符串，字符串以5或6个空格隔开，分为6或7个域，每一个域代表一个含义，Cron有如下两种语法格式： </p>
<p>（1）Seconds Minutes Hours DayofMonth Month DayofWeek Year</p>
<p>（2）Seconds Minutes Hours DayofMonth Month DayofWeek（常用）</p>
<p>每一个域可出现的字符如下： </p>
<p>Seconds:可出现”, - <em> /“四个字符，有效范围为0-59的整数<br>Minutes:可出现”, - </em> /“四个字符，有效范围为0-59的整数<br>Hours:可出现”, - <em> /“四个字符，有效范围为0-23的整数<br>DayofMonth:可出现”, - </em> / ? L W C”八个字符，有效范围为1-31的整数<br>Month:可出现”, - <em> /“四个字符，有效范围为1-12的整数或JAN-DEc<br>DayofWeek:可出现”, - </em> / ? L C #”四个字符，有效范围为1-7的整数或SUN-SAT两个范围。1表示星期天，2表示星期一， 依次类推<br>Year:可出现”, - * /“四个字符，有效范围为1970-2099年</p>
<p>每一个域都使用数字，但还可以出现如下特殊字符，它们的含义是： </p>
<p>(1)<em> ：表示匹配该域的任意值，假如在Minutes域使用</em> , 即表示每分钟都会触发事件。</p>
<p>(2)?:只能用在DayofMonth和DayofWeek两个域。它也匹配域的任意值，但实际不会。因为DayofMonth和 DayofWeek会相互影响。例如想在每月的20日触发调度，不管20日到底是星期几，则只能使用如下写法： 13 13 15 20 <em>  ?, 其中最后一位只能用？，而不能使用</em> ，如果使用* 表示不管星期几都会触发，实际上并不是这样。</p>
<p>(3)-:表示范围，例如在Minutes域使用5-20，表示从5分到20分钟每分钟触发一次</p>
<p>(4)/：表示起始时间开始触发，然后每隔固定时间触发一次，例如在Minutes域使用5/20,则意味着5分钟触发一次，而25，45等分别触发一次. </p>
<p>(5),:表示列出枚举值值。例如：在Minutes域使用5,20，则意味着在5和20分每分钟触发一次。</p>
<p>(6)L:表示最后，只能出现在DayofWeek和DayofMonth域，如果在DayofWeek域使用5L,意味着在最后的一个星期四触发。</p>
<p>(7)W: 表示有效工作日(周一到周五),只能出现在DayofMonth域，系统将在离指定日期的最近的有效工作日触发事件。例如：在 DayofMonth使用5W，如果5日是星期六，则将在最近的工作日：星期五，即4日触发。如果5日是星期天，则在6日(周一)触发；如果5日在星期一 到星期五中的一天，则就在5日触发。另外一点，W的最近寻找不会跨过月份</p>
<p>(8)LW:这两个字符可以连用，表示在某个月最后一个工作日，即最后一个星期五。</p>
<p>(9)#:用于确定每个月第几个星期几，只能出现在DayofMonth域。例如在4#2，表示某月的第二个星期三。</p>
<h3 id="3-2例子"><a href="#3-2例子" class="headerlink" title="3.2例子"></a>3.2例子</h3><p>0 0 10,14,16 <em>  </em>  ? 每天上午10点，下午2点，4点<br>0 0/30 9-17 <em>  </em>  ? 朝九晚五工作时间内每半小时<br>0 0 12 ? <em>  WED 表示每个星期三中午12点<br>“0 0 12 </em>  <em>  ?” 每天中午12点触发<br>“0 15 10 ? </em>  <em> “ 每天上午10:15触发<br>“0 15 10 </em>  <em>  ?” 每天上午10:15触发<br>“0 15 10 </em>  <em>  ? </em> “ 每天上午10:15触发<br>“0 15 10 <em>  </em>  ? 2005” 2005年的每天上午10:15触发<br>“0 <em>  14 </em>  <em>  ?” 在每天下午2点到下午2:59期间的每1分钟触发<br>“0 0/5 14 </em>  <em>  ?” 在每天下午2点到下午2:55期间的每5分钟触发<br>“0 0/5 14,18 </em>  <em>  ?” 在每天下午2点到2:55期间和下午6点到6:55期间的每5分钟触发<br>“0 0-5 14 </em>  <em>  ?” 在每天下午2点到下午2:05期间的每1分钟触发<br>“0 10,44 14 ? 3 WED” 每年三月的星期三的下午2:10和2:44触发<br>“0 15 10 ? </em>  MON-FRI” 周一至周五的上午10:15触发<br>“0 15 10 15 <em>  ?” 每月15日上午10:15触发<br>“0 15 10 L </em>  ?” 每月最后一日的上午10:15触发<br>“0 15 10 ? <em>  6L” 每月的最后一个星期五上午10:15触发<br>“0 15 10 ? </em>  6L 2002-2005” 2002年至2005年的每月的最后一个星期五上午10:15触发<br>“0 15 10 ? *  6#3” 每月的第三个星期五上午10:15触发</p>
<h2 id="4-秒杀商品列表的增量更新"><a href="#4-秒杀商品列表的增量更新" class="headerlink" title="4.秒杀商品列表的增量更新"></a>4.秒杀商品列表的增量更新</h2><p>每分钟执行查询秒杀商品表，将符合条件的记录并且缓存中不存在的秒杀商品存入缓存</p>
<pre class="line-numbers language-java" data-language="java"><code class="language-java"><span class="token comment">//刷新秒杀商品</span>
<span class="token annotation punctuation">@Scheduled</span><span class="token punctuation">(</span>cron<span class="token operator">=</span><span class="token string">"0 *  *  *  *  ?"</span><span class="token punctuation">)</span>
<span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">refreshSeckillGoods</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">{</span>
    <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">"执行了任务调度"</span><span class="token operator">+</span><span class="token keyword">new</span> <span class="token class-name">Date</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>			
    <span class="token comment">//查询所有的秒杀商品键集合</span>
    <span class="token class-name">List</span> ids <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">ArrayList</span><span class="token punctuation">(</span> redisTemplate<span class="token punctuation">.</span><span class="token function">boundHashOps</span><span class="token punctuation">(</span><span class="token string">"seckillGoods"</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">keys</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token comment">//查询正在秒杀的商品列表		</span>
    <span class="token class-name">TbSeckillGoodsExample</span> example<span class="token operator">=</span><span class="token keyword">new</span> <span class="token class-name">TbSeckillGoodsExample</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token class-name">Criteria</span> criteria <span class="token operator">=</span> example<span class="token punctuation">.</span><span class="token function">createCriteria</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    criteria<span class="token punctuation">.</span><span class="token function">andStatusEqualTo</span><span class="token punctuation">(</span><span class="token string">"1"</span><span class="token punctuation">)</span><span class="token punctuation">;</span><span class="token comment">//审核通过</span>
    criteria<span class="token punctuation">.</span><span class="token function">andStockCountGreaterThan</span><span class="token punctuation">(</span><span class="token number">0</span><span class="token punctuation">)</span><span class="token punctuation">;</span><span class="token comment">//剩余库存大于0</span>
    criteria<span class="token punctuation">.</span><span class="token function">andStartTimeLessThanOrEqualTo</span><span class="token punctuation">(</span><span class="token keyword">new</span> <span class="token class-name">Date</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span><span class="token comment">//开始时间小于等于当前时间</span>
    criteria<span class="token punctuation">.</span><span class="token function">andEndTimeGreaterThan</span><span class="token punctuation">(</span><span class="token keyword">new</span> <span class="token class-name">Date</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span><span class="token comment">//结束时间大于当前时间		</span>
    criteria<span class="token punctuation">.</span><span class="token function">andIdNotIn</span><span class="token punctuation">(</span>ids<span class="token punctuation">)</span><span class="token punctuation">;</span><span class="token comment">//排除缓存中已经有的商品 		</span>
    <span class="token class-name">List</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">TbSeckillGoods</span><span class="token punctuation">&gt;</span></span> seckillGoodsList<span class="token operator">=</span> seckillGoodsMapper<span class="token punctuation">.</span><span class="token function">selectByExample</span><span class="token punctuation">(</span>example<span class="token punctuation">)</span><span class="token punctuation">;</span>		
    <span class="token comment">//装入缓存 </span>
    <span class="token keyword">for</span><span class="token punctuation">(</span> <span class="token class-name">TbSeckillGoods</span> seckill<span class="token operator">:</span>seckillGoodsList <span class="token punctuation">)</span><span class="token punctuation">{</span>
        redisTemplate<span class="token punctuation">.</span><span class="token function">boundHashOps</span><span class="token punctuation">(</span><span class="token string">"seckillGoods"</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">put</span><span class="token punctuation">(</span>seckill<span class="token punctuation">.</span><span class="token function">getId</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">,</span> seckill<span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>
    <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">"将"</span><span class="token operator">+</span>seckillGoodsList<span class="token punctuation">.</span><span class="token function">size</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token operator">+</span><span class="token string">"条商品装入缓存"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span><span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre>
<h2 id="5-过期秒杀商品的移除"><a href="#5-过期秒杀商品的移除" class="headerlink" title="5.过期秒杀商品的移除"></a>5.过期秒杀商品的移除</h2><p>每秒中在缓存的秒杀上皮列表中查询过期的商品，发现过期同步到数据库，并在缓存中移除该秒杀商品</p>
<pre class="line-numbers language-java" data-language="java"><code class="language-java"><span class="token comment">//移除秒杀商品</span>
<span class="token annotation punctuation">@Scheduled</span><span class="token punctuation">(</span>cron<span class="token operator">=</span><span class="token string">"*  *  *  *  *  ?"</span><span class="token punctuation">)</span>
<span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">removeSeckillGoods</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">{</span>
    <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">"移除秒杀商品任务在执行"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token comment">//扫描缓存中秒杀商品列表，发现过期的移除</span>
    <span class="token class-name">List</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">TbSeckillGoods</span><span class="token punctuation">&gt;</span></span> seckillGoodsList <span class="token operator">=</span> redisTemplate<span class="token punctuation">.</span><span class="token function">boundHashOps</span><span class="token punctuation">(</span><span class="token string">"seckillGoods"</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">values</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token keyword">for</span><span class="token punctuation">(</span> <span class="token class-name">TbSeckillGoods</span> seckill<span class="token operator">:</span>seckillGoodsList <span class="token punctuation">)</span><span class="token punctuation">{</span>
        <span class="token keyword">if</span><span class="token punctuation">(</span>seckill<span class="token punctuation">.</span><span class="token function">getEndTime</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">getTime</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token operator">&lt;</span><span class="token keyword">new</span> <span class="token class-name">Date</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">getTime</span><span class="token punctuation">(</span><span class="token punctuation">)</span>  <span class="token punctuation">)</span><span class="token punctuation">{</span><span class="token comment">//如果结束日期小于当前日期，则表示过期</span>
            seckillGoodsMapper<span class="token punctuation">.</span><span class="token function">updateByPrimaryKey</span><span class="token punctuation">(</span>seckill<span class="token punctuation">)</span><span class="token punctuation">;</span><span class="token comment">//向数据库保存记录</span>
            redisTemplate<span class="token punctuation">.</span><span class="token function">boundHashOps</span><span class="token punctuation">(</span><span class="token string">"seckillGoods"</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">delete</span><span class="token punctuation">(</span>seckill<span class="token punctuation">.</span><span class="token function">getId</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span><span class="token comment">//移除缓存数据</span>
            <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">"移除秒杀商品"</span><span class="token operator">+</span>seckill<span class="token punctuation">.</span><span class="token function">getId</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        <span class="token punctuation">}</span>			
    <span class="token punctuation">}</span>
    <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">"移除秒杀商品任务结束"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>		
<span class="token punctuation">}</span><span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre>
<h1 id="Maven-Profile"><a href="#Maven-Profile" class="headerlink" title="Maven Profile"></a>Maven Profile</h1><h2 id="1-什么是MavenProfile"><a href="#1-什么是MavenProfile" class="headerlink" title="1.什么是MavenProfile"></a>1.什么是MavenProfile</h2><p>在我们平常的java开发中，会经常使用到很多配制文件（xxx.properties，xxx.xml），而当我们在本地开发（dev），测试环境测试（test），线上生产使用（product）时，需要不停的去修改这些配制文件，次数一多，相当麻烦。现在，利用maven的filter和profile功能，我们可实现在编译阶段简单的指定一个参数就能切换配制，提高效率，还不容易出错.</p>
<p>profile可以让我们定义一系列的配置信息，然后指定其激活条件。这样我们就可以定义多个profile，然后每个profile对应不同的激活条件和配置信息，从而达到不同环境使用不同配置信息的效果。</p>
<h2 id="2-Maven-Profile入门"><a href="#2-Maven-Profile入门" class="headerlink" title="2.Maven Profile入门"></a>2.Maven Profile入门</h2><p>修改pom.xml，增加profile定义（properties用于设置默认值）</p>
<pre class="line-numbers language-markup" data-language="markup"><code class="language-markup"><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>properties</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>port</span><span class="token punctuation">&gt;</span></span>9105<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>port</span><span class="token punctuation">&gt;</span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>properties</span><span class="token punctuation">&gt;</span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>profiles</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>profile</span><span class="token punctuation">&gt;</span></span>
        <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>id</span><span class="token punctuation">&gt;</span></span>dev<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>id</span><span class="token punctuation">&gt;</span></span>
        <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>properties</span><span class="token punctuation">&gt;</span></span>
            <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>port</span><span class="token punctuation">&gt;</span></span>9105<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>port</span><span class="token punctuation">&gt;</span></span>
        <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>properties</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>profile</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>profile</span><span class="token punctuation">&gt;</span></span>
        <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>id</span><span class="token punctuation">&gt;</span></span>pro<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>id</span><span class="token punctuation">&gt;</span></span>
        <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>properties</span><span class="token punctuation">&gt;</span></span>
            <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>port</span><span class="token punctuation">&gt;</span></span>9205<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>port</span><span class="token punctuation">&gt;</span></span>
        <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>properties</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>profile</span><span class="token punctuation">&gt;</span></span>  
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>profiles</span><span class="token punctuation">&gt;</span></span><span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre>
<p>执行命令 tomcat7:run -P pro 发现以9205端口启动；执行命令 tomcat7:run -P dev 发现以9105端口启动</p>
<p>-P 后边跟的是profile的id</p>
<p>如果我们只执行命令tomcat7:run ,也是以9105启动，因为我们一开始定义的变量值就是9105，就是在不指定profileID时的默认值.</p>
<h2 id="3-切换数据库连接配置"><a href="#3-切换数据库连接配置" class="headerlink" title="3.切换数据库连接配置"></a>3.切换数据库连接配置</h2><h3 id="3-1编写不同环境的配置文件"><a href="#3-1编写不同环境的配置文件" class="headerlink" title="3.1编写不同环境的配置文件"></a>3.1编写不同环境的配置文件</h3><p>在pinyougou-dao工程中src/main/resources下创建filter文件夹</p>
<p>（1）filter文件夹下创建db_dev.properties ，用于配置开发环境用到的数据库</p>
<pre class="line-numbers language-properties" data-language="properties"><code class="language-properties"><span class="token attr-name">env.jdbc.driver</span><span class="token punctuation">=</span><span class="token attr-value">com.mysql.jdbc.Driver</span>
<span class="token attr-name">env.jdbc.url</span><span class="token punctuation">=</span><span class="token attr-value">jdbc:mysql://localhost:3306/pinyougoudb?characterEncoding=utf-8</span>
<span class="token attr-name">env.jdbc.username</span><span class="token punctuation">=</span><span class="token attr-value">root</span>
<span class="token attr-name">env.jdbc.password</span><span class="token punctuation">=</span><span class="token attr-value">123456</span><span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span></span></code></pre>
<p>（2）filter文件夹下创建db_pro.properties </p>
<pre class="line-numbers language-properties" data-language="properties"><code class="language-properties"><span class="token attr-name">env.jdbc.driver</span><span class="token punctuation">=</span><span class="token attr-value">com.mysql.jdbc.Driver</span>
<span class="token attr-name">env.jdbc.url</span><span class="token punctuation">=</span><span class="token attr-value">jdbc:mysql://localhost:3306/pinyougoudb_pro?characterEncoding=utf-8</span>
<span class="token attr-name">env.jdbc.username</span><span class="token punctuation">=</span><span class="token attr-value">root</span>
<span class="token attr-name">env.jdbc.password</span><span class="token punctuation">=</span><span class="token attr-value">123456</span><span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span></span></code></pre>
<p>（3）修改properties下的db.properties</p>
<pre class="line-numbers language-properties" data-language="properties"><code class="language-properties"><span class="token attr-name">jdbc.driver</span><span class="token punctuation">=</span><span class="token attr-value">${env.jdbc.driver}</span>
<span class="token attr-name">jdbc.url</span><span class="token punctuation">=</span><span class="token attr-value">${env.jdbc.url}</span>
<span class="token attr-name">jdbc.username</span><span class="token punctuation">=</span><span class="token attr-value">${env.jdbc.username}</span>
<span class="token attr-name">jdbc.password</span><span class="token punctuation">=</span><span class="token attr-value">${env.jdbc.password}</span><span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span></span></code></pre>
<h3 id="3-2定义Profile"><a href="#3-2定义Profile" class="headerlink" title="3.2定义Profile"></a>3.2定义Profile</h3><p>这里我们定义2个profile，分别是开发环境和生产环境</p>
<pre class="line-numbers language-markup" data-language="markup"><code class="language-markup"><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>properties</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>env</span><span class="token punctuation">&gt;</span></span>dev<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>env</span><span class="token punctuation">&gt;</span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>properties</span><span class="token punctuation">&gt;</span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>profiles</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>profile</span><span class="token punctuation">&gt;</span></span>
        <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>id</span><span class="token punctuation">&gt;</span></span>dev<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>id</span><span class="token punctuation">&gt;</span></span>
        <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>properties</span><span class="token punctuation">&gt;</span></span>
            <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>env</span><span class="token punctuation">&gt;</span></span>dev<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>env</span><span class="token punctuation">&gt;</span></span>
        <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>properties</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>profile</span><span class="token punctuation">&gt;</span></span>    
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>profile</span><span class="token punctuation">&gt;</span></span>
        <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>id</span><span class="token punctuation">&gt;</span></span>pro<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>id</span><span class="token punctuation">&gt;</span></span>
        <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>properties</span><span class="token punctuation">&gt;</span></span>
            <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>env</span><span class="token punctuation">&gt;</span></span>pro<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>env</span><span class="token punctuation">&gt;</span></span>
        <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>properties</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>profile</span><span class="token punctuation">&gt;</span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>profiles</span><span class="token punctuation">&gt;</span></span><span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre>
<h3 id="3-3资源过滤与变量替换"><a href="#3-3资源过滤与变量替换" class="headerlink" title="3.3资源过滤与变量替换"></a>3.3资源过滤与变量替换</h3><pre class="line-numbers language-markup" data-language="markup"><code class="language-markup"><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>build</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>filters</span><span class="token punctuation">&gt;</span></span>
        <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>filter</span><span class="token punctuation">&gt;</span></span>src/main/resources/filters/db_${env}.properties<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>filter</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>filters</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>resources</span><span class="token punctuation">&gt;</span></span>
        <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>resource</span><span class="token punctuation">&gt;</span></span>
            <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>directory</span><span class="token punctuation">&gt;</span></span>src/main/resources<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>directory</span><span class="token punctuation">&gt;</span></span>
            <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>filtering</span><span class="token punctuation">&gt;</span></span>true<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>filtering</span><span class="token punctuation">&gt;</span></span>
        <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>resource</span><span class="token punctuation">&gt;</span></span>  		
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>resources</span><span class="token punctuation">&gt;</span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>build</span><span class="token punctuation">&gt;</span></span><span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre>
<p>这里我们利用filter实现对资源文件(resouces) 过滤<br> maven filter可利用指定的xxx.properties中对应的key=value对资源文件中的${key}进行替换，最终把你的资源文件中的username=${key}替换成username=value </p>
<h3 id="3-4打包"><a href="#3-4打包" class="headerlink" title="3.4打包"></a>3.4打包</h3><p>在pinyougou-dao 工程 执行命令：package -P pro , 解压生成的jar包，观察db.properties配置文件内容，已经替换为生产环境的值。</p>
<p>在pinyougou-sellergoods-service工程 执行命令 pageage ，解压生成的war包里的pinyougou-dao的jar包，发现也是生成环境的值。</p>
<h2 id="4-切换注册中心连接配置"><a href="#4-切换注册中心连接配置" class="headerlink" title="4.切换注册中心连接配置"></a>4.切换注册中心连接配置</h2><h3 id="4-1集中配置注册中心地址"><a href="#4-1集中配置注册中心地址" class="headerlink" title="4.1集中配置注册中心地址"></a>4.1集中配置注册中心地址</h3><p>（1）在pinyougou-common工程中properties下创建dubbox.properties</p>
<pre class="line-numbers language-properties" data-language="properties"><code class="language-properties"><span class="token attr-name">address</span><span class="token punctuation">=</span><span class="token attr-value">192.168.25.135:2181</span><span aria-hidden="true" class="line-numbers-rows"><span></span></span></code></pre>
<p>（2）Spring目录下创建spring配置文件 applicationContext-dubbox.xml 配置如下：</p>
<pre class="line-numbers language-markup" data-language="markup"><code class="language-markup"><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span><span class="token namespace">dubbo:</span>registry</span> <span class="token attr-name">protocol</span><span class="token attr-value"><span class="token punctuation">=</span><span class="token punctuation">"</span>zookeeper<span class="token punctuation">"</span></span> <span class="token attr-name">address</span><span class="token attr-value"><span class="token punctuation">=</span><span class="token punctuation">"</span>${address}<span class="token punctuation">"</span></span><span class="token punctuation">/&gt;</span></span><span aria-hidden="true" class="line-numbers-rows"><span></span></span></code></pre>
<p>（3）所有的服务工程与web工程都要依赖pinyougou-common . 并删除每个工程中关于注册中心地址的配置 </p>
<p>（4）安装pinyougou-common到本地仓库，然后测试运行。</p>
<h3 id="4-2MavenProfile配置"><a href="#4-2MavenProfile配置" class="headerlink" title="4.2MavenProfile配置"></a>4.2MavenProfile配置</h3><p>（1）在pinyougou-common工程中创建filters目录 ，目录下建立dubbox_dev.properties</p>
<pre class="line-numbers language-properties" data-language="properties"><code class="language-properties"><span class="token attr-name">env.address</span><span class="token punctuation">=</span><span class="token attr-value">192.168.25.135:2181</span><span aria-hidden="true" class="line-numbers-rows"><span></span></span></code></pre>
<p>（2）建立dubbox_pro.properties</p>
<pre class="line-numbers language-properties" data-language="properties"><code class="language-properties"><span class="token attr-name">env.address</span><span class="token punctuation">=</span><span class="token attr-value">192.168.25.136:2181</span><span aria-hidden="true" class="line-numbers-rows"><span></span></span></code></pre>
<p>（3）修改dubbox.properties</p>
<pre class="line-numbers language-properties" data-language="properties"><code class="language-properties"><span class="token attr-name">address</span><span class="token punctuation">=</span><span class="token attr-value">${env.address}</span><span aria-hidden="true" class="line-numbers-rows"><span></span></span></code></pre>
<p>（4）修改pinyougou-common的pom.xml</p>
<pre class="line-numbers language-markup" data-language="markup"><code class="language-markup"><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>properties</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>env</span><span class="token punctuation">&gt;</span></span>dev<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>env</span><span class="token punctuation">&gt;</span></span>	
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>properties</span><span class="token punctuation">&gt;</span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>profiles</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>profile</span><span class="token punctuation">&gt;</span></span>
        <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>id</span><span class="token punctuation">&gt;</span></span>dev<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>id</span><span class="token punctuation">&gt;</span></span>
        <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>properties</span><span class="token punctuation">&gt;</span></span>
            <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>env</span><span class="token punctuation">&gt;</span></span>dev<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>env</span><span class="token punctuation">&gt;</span></span>
        <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>properties</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>profile</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>profile</span><span class="token punctuation">&gt;</span></span>
        <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>id</span><span class="token punctuation">&gt;</span></span>pro<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>id</span><span class="token punctuation">&gt;</span></span>
        <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>properties</span><span class="token punctuation">&gt;</span></span>
            <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>env</span><span class="token punctuation">&gt;</span></span>pro<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>env</span><span class="token punctuation">&gt;</span></span>
        <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>properties</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>profile</span><span class="token punctuation">&gt;</span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>profiles</span><span class="token punctuation">&gt;</span></span> 
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>build</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>filters</span><span class="token punctuation">&gt;</span></span>
        <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>filter</span><span class="token punctuation">&gt;</span></span>src/main/resources/filters/dubbox_${env}.properties<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>filter</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>filters</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>resources</span><span class="token punctuation">&gt;</span></span>
        <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>resource</span><span class="token punctuation">&gt;</span></span>
            <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>directory</span><span class="token punctuation">&gt;</span></span>src/main/resources<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>directory</span><span class="token punctuation">&gt;</span></span>
            <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>filtering</span><span class="token punctuation">&gt;</span></span>true<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>filtering</span><span class="token punctuation">&gt;</span></span>
        <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>resource</span><span class="token punctuation">&gt;</span></span>	
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>resources</span><span class="token punctuation">&gt;</span></span>	
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>build</span><span class="token punctuation">&gt;</span></span><span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre>
<h1 id="MongoDB简介"><a href="#MongoDB简介" class="headerlink" title="MongoDB简介"></a>MongoDB简介</h1><h2 id="1-什么是MongoDB"><a href="#1-什么是MongoDB" class="headerlink" title="1.什么是MongoDB"></a>1.什么是MongoDB</h2><p>MongoDB 是一个跨平台的，面向文档的数据库，是当前 NoSQL 数据库产品中最热门的一种。它介于关系数据库和非关系数据库之间，是非关系数据库当中功能最丰富，最像关系数据库的产品。它支持的数据结构非常松散，是类似JSON 的 BSON 格式，因此可以存储比较复杂的数据类型。</p>
<p>MongoDB 的官方网站地址是：<a target="_blank" rel="noopener" href="http://www.mongodb.org/">http://www.mongodb.org/</a></p>
<h2 id="2-MongoDB特点"><a href="#2-MongoDB特点" class="headerlink" title="2.MongoDB特点"></a>2.MongoDB特点</h2><p>MongoDB 最大的特点是他支持的查询语言非常强大，其语法有点类似于面向对象的查询语言，几乎可以实现类似关系数据库单表查询的绝大部分功能，而且还支持对数据建立索引。它是一个面向集合的,模式自由的文档型数据库。</p>
<p>具体特点总结如下：</p>
<p>（1）面向集合存储，易于存储对象类型的数据</p>
<p>（2）模式自由</p>
<p>（3）支持动态查询</p>
<p>（4）支持完全索引，包含内部对象</p>
<p>（5）支持复制和故障恢复</p>
<p>（6）使用高效的二进制数据存储，包括大型对象（如视频等）</p>
<p>（7）自动处理碎片，以支持云计算层次的扩展性</p>
<p>（8）支持 Python，PHP，Ruby，Java，C，C#，Javascript，Perl 及 C++语言的驱动程序，社区中也提供了对 Erlang 及.NET 等平台的驱动程序</p>
<p>（9） 文件存储格式为 BSON（一种 JSON 的扩展）</p>
<h2 id="3-MongoDB体系结构"><a href="#3-MongoDB体系结构" class="headerlink" title="3.MongoDB体系结构"></a>3.MongoDB体系结构</h2><p>MongoDB 的逻辑结构是一种层次结构。主要由：</p>
<p>文档(document)、集合(collection)、数据库(database)这三部分组成的。逻辑结构是面向用户</p>
<p>的，用户使用 MongoDB 开发应用程序使用的就是逻辑结构。</p>
<p>（1）MongoDB 的文档（document），相当于关系数据库中的一行记录。</p>
<p>（2）多个文档组成一个集合（collection），相当于关系数据库的表。</p>
<p>（3）多个集合（collection），逻辑上组织在一起，就是数据库（database）。</p>
<p>（4）一个 MongoDB 实例支持多个数据库（database）。</p>
<h2 id="4-MongoDB在品优购系统中的应用"><a href="#4-MongoDB在品优购系统中的应用" class="headerlink" title="4.MongoDB在品优购系统中的应用"></a>4.MongoDB在品优购系统中的应用</h2><p>MongoDB通常存储价值不大，但是偏复杂且数据量大的数据。我们品优购的评价系统、收藏系统采用等信息存储在MongoDB 。</p>
<h1 id="结语"><a href="#结语" class="headerlink" title="结语"></a>结语</h1><p>跨越了6、7、8、9四个月的品优购系统开发终于在十一之前完结啦🖖🖖🖖🖖后续还有3章系统部署有时间学习整理一波呈现给大家😜</p>
<p>下一个征战——虚幻4！！！！</p>
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